Win7 set up interrupted, now won't load software

That is good news.
Do make sure you make Acer Recovery disks.



You can Order Acer recovery disks from here:
https://secure.tx.acer.com/RCDB/Main.aspx?brand=acer

That was also my first suggestion for you to run Factory Recovery if Startup Repair didn't work.

And to be useful on a rainy day when you are left with no option but do a clean install - well, you can see many such instances here - back up your OEM activation and keep it safely.

https://www.sevenforums.com/windows-u...s-manager.html

All points noted. Will do. Always more to learn! Many thanks again to all.